Q: What is the sum of all factors of the number 315,480 excluding 315,480?

A: 721,320

Why is 721,320 the sum of all factors of 315,480, excluding 315,480?

The factors of the number 315,480 are: 1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 15, 20, 22, 24, 30, 33, 40, 44, 55, 60, 66, 88, 110, 120, 132, 165, 220, 239, 264, 330, 440, 478, 660, 717, 956, 1195, 1320, 1434, 1912, 2390, 2629, 2868, 3585, 4780, 5258, 5736, 7170, 7887, 9560, 10516, 13145, 14340, 15774, 21032, 26290, 28680, 31548, 39435, 52580, 63096, 78870, 105160, 157740, 315480.

If you add them up, you will get the total of 316,201. Now subtract 315,480 to get 721,320